<!DOCTYPE html>
<html>
<head>
    <meta charset='UTF-8'>
    <title>行内框测试</title>
    <style>
        p {
            background: green;
            color: white;
        }
        span.cus{
            font-weight: bold;
            padding: 10px;
            margin: 10px;
        }
    </style>
</head>
<body>
    <p>
        fjsdlkfjs jsdklfj slkdjf sj lsdkfj sklf
        fdskl jsdklfj sjkflsdjf fjldskjf
        <span class="cus">span test</span>
        fjsdfjklsjf skldfjlksdjf
    </p>
</body>